[keycloak-user] Impersonate user feature stop working after 3.2.0.Final

Hi Keycloak Community, After successfully upgrade our servers from keycloak 2.5.4.Final to 3.4.0.Final, we have notice that the impersonation feature isn't working anymore. We have tested other versions with a vanilla install and the first version with this problem is 3.2.0.Final. Are you experiencing this problem? Impersonation is a quite useful feature to us, so any workaround until next release would be great. Regards, Diego Díez